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Jun 18, 2024 · The big-bang model is the widely accepted theory of the origin and evolution of the universe from a hot and dense state 13.8 billion years ago. Learn about its assumptions, predictions, observations, and challenges from Britannica's experts.
- Planck Time
In cosmology: Superunification and the Planck era. This...
- Cosmological Model
Other articles where cosmological model is discussed:...
- Cosmological Principle
Other articles where cosmological principle is discussed:...
- Expanding Universe
Expanding universe, dynamic state of the extragalactic...
- Kids
Between 10 and 15 billion years ago, scientists believe, the...
- Was The Big Bang Actually an Explosion
The big-bang theory was first proposed by Georges Lemaître...
- Georges LeMaître
Georges Lemaître (born July 17, 1894, Charleroi,...
- The Steady-State Challenge
However, there were predictable observational consequences...
- Planck Time
Jun 4, 2024 · The Big Bang theory is the prevailing cosmological model explaining the observable universe’s origin and expansion. According to this theory, the universe began as an infinitely dense and hot singularity approximately 13.8 billion years ago.
3 days ago · Journey back to the very beginning of the universe with "The Big Bang Theory: Origins & Key Scientists"! 🌌💥In this video, we explore the fascinating origin...
Jun 16, 2024 · Georges Lemaître (born July 17, 1894, Charleroi, Belgium—died June 20, 1966, Leuven) was a Belgian astronomer and cosmologist who formulated the modern big-bang theory, which holds that the universe began in a cataclysmic explosion of a small, primeval “super-atom.”
Jun 3, 2024 · The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now—and it is still stretching!
Jun 10, 2024 · Physicists have proposed a new theory: in the first quintillionth of a second after Big Bang, the universe may have sprouted microscopic black holes.
Jun 17, 2024 · However, there were predictable observational consequences that should allow one to distinguish between a steady-state universe or a big-bang universe. (The term big bang was coined by Hoyle as a mildly pejorative characterization of the rival theory in a radio talk in 1949.)
